- Volume 24 Issue 1
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Risk assessment of heavy metals in soil based on the geographic information system-Kriging technique in Anka, Nigeria
- Johnbull, Onisoya (School of Engineering, University of Guelph) ;
- Abbassi, Bassim (School of Engineering, University of Guelph) ;
- Zytner, Richard G. (School of Engineering, University of Guelph)
- Received : 2018.03.31
- Accepted : 2018.07.12
- Published : 2019.03.31
Soil contaminated with heavy metals from artisanal gold mining in Anka Local Government Area in Northwestern Nigeria was investigated to evaluate the human health risk as a result of heavy metals. Measured concentration of heavy metals and exposure parameters were used to estimate human carcinogenic and non-carcinogenic risk. GIS-based Kriging method was utilized to create a prediction maps of human health risks and probability maps of heavy metals concentrations exceeding their threshold limits. Hazard index calculation showed that 21 out of 23 locations are posing non-cancer risk for children. Adults and children are at high cancer risk in all locations as the total cancer risk exceeded
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